All industrial user charges shall be established by separate agreement between each separate contributing industry and Elko County. All charges so established shall be in proportion to the benefits derived by the user from the sewerage system and shall be in accordance with pertinent federal regulations as are defined herein as the Act. The charges so established shall generate sufficient revenue to pay the industrial user portion of the bonded indebtedness, operating and maintenance of the sewerage system, reserve fund as required to pay for further capital improvements to the sewerage treatment plant and industrial cost recovery payments as outlined in Section 9-2-25, all as required by the Act. The charges shall be based on the amount of flow (Q), the biochemical oxygen demand (BOD), the suspended solids (SS) and any other pertinent components of the wastes that the industrial user is contributing to the sewerage system.
All contributing industrial user charges shall be reviewed annually and revised as necessary to insure that each contributing industrial user pays its allocable share. If the discharge of a contributing industrial user changes significantly, greater than ten percent (10%) plus or minus, (by strength, volume, delivery flow rate or other pertinent component characteristics) such industrial user's charge shall be adjusted accordingly to assure that the user continues to pay its allocable share.